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        <h2>
          <span class="refentrytitle">flanger</span>
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        <p>flanger — 
      A user controlled flanger.
    </p>
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      <div class="refsect1">
        <a id="idp103467328"></a>
        <h2>Description</h2>
        <p>
      A user controlled flanger.
    </p>
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      <div class="refsect1">
        <a id="idp103468528"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>flanger</strong></span> asig, adel, kfeedback [, imaxd]</pre>
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      <div class="refsect1">
        <a id="idp103470752"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>imaxd</em></span>(optional) -- maximum delay in seconds (needed for inital memory allocation)
    </p>
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      <div class="refsect1">
        <a id="idp103472448"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>asig</em></span> -- input signal
    </p>
        <p>
      <span class="emphasis"><em>adel</em></span> -- delay in seconds
    </p>
        <p>
      <span class="emphasis"><em>kfeedback</em></span> -- feedback amount (in normal tasks this should not exceed 1, even if bigger values are allowed)
    </p>
        <p>
      This unit is useful for generating choruses and flangers. The delay must be varied at a-rate, for example by connecting <span class="emphasis"><em>adel</em></span> to an oscillator output. The feedback can vary at k-rate.  This opcode is implemented to allow <span class="emphasis"><em>kr</em></span> different than <span class="emphasis"><em>sr</em></span> (else delay could not be lower than <span class="emphasis"><em>ksmps</em></span>) enhancing realtime performance. This unit is very similar to <a class="link" href="wguide1.html" title="wguide1"><em class="citetitle">wguide1</em></a>, the only difference is <span class="emphasis"><em>flanger</em></span> does not have the lowpass filter or the requirement that the delay be varied at a-rate.
    </p>
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      <div class="refsect1">
        <a id="idp103479664"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the flanger opcode. It uses the file <a class="ulink" href="examples/flanger.csd" target="_top"><em class="citetitle">flanger.csd</em></a>.
      </p>
        <div class="example">
          <a id="idp103481520"></a>
          <p class="title">
            <strong>Example 260. Example of the flanger opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac     <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">;-o flanger.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1

<span class="oblock">instr</span> 1

kfeedback <span class="op">=</span> p4
asnd <span class="opc">vco2</span> .2, 50
adel <span class="opc">linseg</span> 0, p3<span class="op">*</span>.5, 0.02, p3<span class="op">*</span>.5, 0	<span class="comment">;max delay time =20ms	</span>
aflg <span class="opc">flanger</span> asnd, adel, kfeedback
asig <span class="opc">clip</span> aflg, 1, 1
     <span class="opc">outs</span> asig<span class="op">+</span>asnd, asig<span class="op">+</span>asnd		<span class="comment">;mix flanger with original</span>

<span class="oblock">endin</span>
<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>

<span class="stamnt">i</span> 1 0 10 .2
<span class="stamnt">i</span> 1 11 10 .8	<span class="comment">;lot of feedback</span>
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp103485808"></a>
        <h2>See Also</h2>
        <p> More information on flanging on Wikipedia: <a class="ulink" href="http://en.wikipedia.org/wiki/Flanger" target="_top"><em class="citetitle">http://en.wikipedia.org/wiki/Flanger</em></a></p>
      </div>
      <div class="refsect1">
        <a id="idp103487744"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
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            <td>Author: Gabriel Maldonado</td>
          </tr>
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            <td>Italy</td>
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        <p>
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        <p>New in Csound version 3.49</p>
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